Questions About XII Characters in their XIV Versions

[Haventale]

What's the timeline/continuity of the FFXII characters and their FFXIV versions? Who's still here? Who's alive or dead? How old are they?

I think I read that Ashe and her arranged marriage spouse in their XIV versions are now siblings instead or something? And I think someone said they're both dead?

Fran is still here of course. I haven't seen any mention of Balthier, Vaan or Penelo?

Basch and Gabranth are where I'm mostly getting confused though. I thought that, whatever events of XII have been reinterpreted for XIV, happened a long time ago, and that Fran was the only character left, the others having passed away long ago. But when I finished the Bozja story, they said a character was trained by Basch (I can't remember who, Lyon?). If that's the case, does Basch still live, and has he yet to leave the empire? Is he still a middle aged man? Or are Basch and Gabranth now elderly in this current time?